669901829 has 16 divisors (see below), whose sum is σ = 724584000. Its totient is φ = 617258880.

The previous prime is 669901823. The next prime is 669901831. The reversal of 669901829 is 928109966.

It is a cyclic number.

It is not a de Polignac number, because 669901829 - 2²⁴ = 653124613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669901823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294107 + ... + 296375.

It is an arithmetic number, because the mean of its divisors is an integer number (45286500).

Almost surely, 2^669901829 is an apocalyptic number.

It is an amenable number.

669901829 is a deficient number, since it is larger than the sum of its proper divisors (54682171).

669901829 is a wasteful number, since it uses less digits than its factorization.

669901829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 669901829 is about 25882.4618033138. The cubic root of 669901829 is about 874.9912724027.

The spelling of 669901829 in words is "six hundred sixty-nine million, nine hundred one thousand, eight hundred twenty-nine".